Pump packing assembly and packing rings



July 12, W32.

J. H. M EVOY PUMP PACKING ASSEMBLY AND PACKING RINGS Filed Sept. 11,1928 2 Sheets-Sheet atto'l, ma

July 12, 1932. J. H. M EVO PUMP PACKING ASSEMBLY AND PACKING RINGS FiledSept. 11, 1928 '2 Sheets-Sheet 2 Patented July 12, 1932 UNITED, STATESPATENT. oFFica JOSEPH H. McEVoY, or HOUSTON, TEXAS PUMP PACKINGASSZEJVIBLY AND PACKING 'RINGS Application filed September 11, 1928.Serial No. 305,222.

The invention relates to an improved arrangement of the packing disposedabout the Another object is to devise a packing as-,-

sembly which will be adjustable'to compen- 1 sate for wear without beingremoved from the pump barrel. v

A further object is to so arrange the packing and spacer rings eitherupon the pump rod or upon the pump barrel that they may be readily.adjusted and a fluid tight seal be maintained throughout the life of thepacklng.

Other objects of the present improvements are to provide an improvedvalve construction, a novel ratchet arrangement to retain the packlng incompressed relatlon, and to manufacture this particular type of packingin several forms inaccordance with the demands which may arise.

9 Other and further objects will be readily apparent to those skilled inthe art when the following description is considered in connection withthedrawings, wherein v Fig. 1 is a longitudinal section of a pump Fig. 5is a view similar to Fig. 1 but showing the packing carried by the pumprod instead of the pump barrel. 1

Figs. 6 and 7 show modified forms of this type of packing.

Figs. 8 and 9 show an elevation andsection showing the improved packingarranged respectively of the lower end of the pump plunger While,

Figs. 10 and 11 showan elevation partly broken away, and a section ofthe spring sleeve as used in Fig. 5. f p

The construction shown in Fig. 1 discloses a pump barrel 10 whichcarries threaded to its lower end a coupling 11 which in turnis threadedto a nipple 12. This nipple 12 is connected to a standing valve assembly.13 of 1 usual construction. The coupling 11 has upper end terminatingin a shoulder 14, and is hollowed internally to provide an annular seat15 for the packing 16. This packing, tends to prevent the passage ofsand and grit; upwardly around the pumpplunger. v V Y Inside the pumpbarrel 10 the pump plunger or pump rod 20 is adaptedto recip rocate.Between the pump plunger and pump barrel is an annular opening which. isto be filled with packing material which mustv maintain a fluid sealbetween the-two members. The packing maybe arranged in any of severalforms as disclosed by this application. Fig. 1 shows an assemblyofspacer rings 21 and packing rings 22. These rings may be arranged asshown with their wedge faces in contact. These rings may be formed as aclosed annular ring, theymaybe split ringsor in some. instances formedof two or' more sections to make up an annular ring. The spacer rings 21it will be noted are somewhat separated leavingan opening23. As.

the packing rings 22 wear away in use the.

spacer rings are compressed at intervals' 'to eventually fill'the space23 as will'be'later described. I V 1 The spacer rings may be formed ofsteel, 1 brass orany other suitable metal but are preferablyof ametalsomewhat harderthan the packing rings which may be of babbitt, tin,

solder, lead or any suitable metalalloyiwhich. may be readily deformed.i

The spacer rings'21 as shown haveagroove: 2 1 at the apex of the faceand adjacentthe meeting edges of the packing rings. When theentire'packer is compressed the tapered faces of the respective rings 21and 22'ten'd to slide uponeach other which resultsincom pressing thepacking to form a fiuid tight.

compressed the edge of each ring is deformed to enter the groove 24,whereby each ring is then somewhat firmly attached to its re- .spectivespacing rings and no one ring is then able to take up .all of themovement of the entire assembly.

The lowermost spacer is shown as a half, ring and rests upon theshoulder 14 previously described. The uppermostspacer, is.

also a. half ring and forms a shoulder 25 upon which is placed thecompressing sleeve 26. This sleeve forms a means for retaining thepacking assembly in position and hasinternal and external acking ringsthereon as shown at 27 and 28, V enlarged elevation of the sleeve whichis made of spring metal and has longitudinal slits V therein thusforming the fingers 30. Each 201 finger 30 has its end flared outwardlyand formed with ratchet teeth as at 31. The sleeve may, however, beformed without the slits and a single spring finger punched therefrom toact as a locking member. The inside of the pump barrel 10 has ratchetteeth 32 which correspond to and'are adapted to mesh with the aforesaidteeth 31 The'top of the pump plunger 20 has threaded to it the usualvalve cage 33, but in this instance the lower end 34 thereo-fserves aspecific function. Fig. 1 shows a pump plunger at a point below itsnormal working position but still it maybe lowered further.

until the end 34 of the cage 33 contacts with the ledge 35 on the insideof the sleeve 26. It is by means of this structure that the packingassembly is' compressed at will. The pump plunger is lowered to aposition such as shown in Fig. 1 and then dropped sharply to striketheledge 35. This drives the sleeve 26 downwardly and compresses thepacking rings which as stated are supported on the coupling 14.. }As thesleeve 26 travels'downward the ratchet teeth 31 slide past the teeth 32of the pump barrel and the packing is thus held in its compressedcondition. As the,

packing rings wear away the sleeve 26 may be again bumped or struck tofurther compress the packing. a a V It seems apparent with thisconstruction thata novel assembly has beenevolved and that any necessaryadjustment of the packing is easily obtained by merely lowering the pumprod as described. Themetallic packing used is not subject todeterioration when subjected to hot water which is often encounteredandithere is nothing in the assembly to be replaced until the packingrings'have been completely worn away and 'th'e'ratchet driven to itslowermost position. z The pacl 'ng assembly as hereshown form a rigidsubstantial support for the pump plunger 20 so'that any tendency ofvibration is avoided The additional packing rings 27 and 28*prevent'sandand grit from entering ig. 1. -Fig..4 shows an the assembly so that wearof the parts is reduced to a minimum.

Fig.2 shows a broken section of the assembly of Fig. 1 but having spacerand packing rings of a different configuration. The spacer rings as inFig. 1 may be made of any having a concentric annular groove upon oneside and a-ridge upon the other side. WVhen two of these cap rings areplaced with'the groovesthereof adj acent,*a cavity is formed to receivethe packing ring 44. The cap members and packing ring are both formed ofa readily'deformable metal but preferably the ring 44 is softer-than thecap rings42 and 43 whereas the spacer rings 40 are composed of amaterial harder than either of the others.

7 This embodiment of the invention is con structed to function the sameas that of Fig. l 'as when it is compressed the packing ring 44 willbulge out expanding the cap rings 42 and 43 forming a. fluid tightbearing for the pump plunger. Theadvantage obtained by this constructionis that the'so-fter pack-ing metal 44 is confined between walls ofharder metal and does not therefore come incontact with the movingplunger rod. This proexpanded forcing the ring 52 into fluid tight'engagement'with the pump rod. This form of the invention is especiallyadapted to a worn pump rod where agreat deal of eX-' pansionis desiredand could very fWell be used to accommodatelthe'next smaller size ofpump plunger by merely compressing the sleeve 26. s

' In combination-with the structure just described in Fig. Lthere isshown an improved; valve-55 which isshown' best at the topof Fig. 5. Ithas been customary in pumps'fof this type to provide atth'etop a ballvalve similar to that shown at-"the bottom of Fig. 1, however, "a valvehaving acone seat '56 and a stem 57 whichis ada-pted'to slide in asleeve 58, has beenfoundinuchbetter in sew-s ice. Such a valve as shownwhen pressed to closed position; by a spring 59 is=at-all times held ina perpendicular position and quickly seats whenthe flow'offiu-id ceases.With the usual ball valvethe fluid, gasesv and barrel 71.

iseaso sand passing tend to set the ball to bobbing around against theseat and the valve cage whereby it is soon worn and a leaking valveresults. The valve seat as here shown is a removable ring 60 which restsupon a coupling 61 threaded to the pump rod. The valve cage 33 isthreaded onto the coupling 61 and has a shoulder to engage the ring 60and hold it firmly in position.

Fig. 5 also shows a form which the invention may take in that thepacking rings, spacer rings, and ratchet sleeve are carried by theplunger and the moving surface is between the packing rings andthepumpbarrel. Theform shown in Fig. 5 is somewhat similar to the form ofFig. 2 but the cap rings 65 and 66 have been modified to cover only oneside and one edge of the packing ring 67 Thus the packing ring rests inconstant engagement with the plunger 70, andthe harder metal 65 and '66takes the wear with the The spacer rings 72 have-been altered to meetthe existing conditions, nan1e 1y, several oil grooves 73 have beenprovided to trap lubricant and to prevent the passage of sand or grit.The internal surface of the spacer ring 72 has been hollowed out as at74. 1

The construction of the ratchet sleeve is similar to that of Fig. 1except the sleeve 76 is carried'by the pump plunger 70 and the ratchetteeth 77 are formed on the plunger at 78. Having reference to Figs. 8 to11, enlarged views of the sleeve and ratchet are shown. The ratchetteeth are here shown as a series of threads 77 which may either be rightor left handed as desired. A longitudinal groove 79 is formed in theplunger which acts as a lock in conjunction with the finger. 80 of thesleeve 76. i

A special coupling 83 is shown connecting the pump barrel and the nipplethere below and has an inwardly projecting shoulder 84 upon which theledge 85 of the sleeve 76 is adapted to be struck the same as in thearrangement of Fig. 1. A separate ring may be provided to take the placeof the integral shoulder 84 if desired. If this is provided it is heldin place by the adjacent ends of the pump barrel, and nipple as wellas-the coupling 83.

In-this form of the ratchet sleeve it is preferable that any compressingof the packing rings be done by screwing the sleeve 76 onto the threads77. To accomplish this the pump rod is lowered until the weight restsupon the shoulder 84 and the ledge 85, the plunger is then rotated andthe weight compresses the packing and permits rotation of the plunger inthe sleeve 76. It isto be understood that either the ratchet of Fig. 1or the threaded arrangement of Fig. 5 may be employed.

Fig. 6 shows a further embodiment of the packing assembly as adapted foruse in Fig.

5, namely it is to be carried by the pump with the pump rod.

plunger" instead of the casing. Th1Sjdi$- closure is theexactcounterpart of-Fig; 1.- The spacer rings 88 and packing rings 89 beingreversed as to their position. a

Fig. 7 shows a still further modification adjacent the pump barrel totake the wear.

The packing rings 93 have on their inner 3 surface a shim 92 which maybe of brass, this shim 92contacts with one of the steps 94 of the spacerring 9O.v Thus when the-sleeve 76 is screwed or bumped over the ratchetteeth the shim 92 shears off of the step 9.4 to

. the next step and allows the rubber packing ring 93 to firmly press itinto engagement The several figures of the drawings illustrate staggeredsets of rings in mostinstances 'butfor the purposes of'this improvementthe U entire assembly may ifdesired be madeof packing rings and thespacer rings dispensed with. In the event this form is adopted thepacking rings would have co-acting grooves and recesses as shown in Fig.2 onthe cap and spacer rings. Either-the packing or the spacer rings maybe formed in rings similar to the spacing rings of Fig. 2 if desired.

The spring sleeve of Figs. 4' and 10 may be if desired formedother thanhere illustrated in'that any number of fingers may be provided orasstated the sleevemay be tubular and a single indented or outwardlypressed compress the packing at the top of the assembly, Whereas Fig. 5shows it at the bot- "tom, either may be used as the occasion demandswithout departing from the spirit of the invention.

It is believed that from the foregoing description those skilled in theart will be enabled to practice the improvement which may readily. takeembodiments other than here shown without departing from the spirit ofthe invention.

Having described the invention, what i claimed is: 1

1. In a pump, alternate packing and spacing rings, each packing ringbeing elongated adjacent the inner side and of shorter length on itsouter side, said spacing rings being shaped to interfit between saidpacking rings and formed witha plurality of shoulders and an innersleeve on said packing rings to engage one of said shoulders on 7 2. Ina pump; alternate packing and-spac ing rings, each packing ring beingelongated adjacent the inner side and of shorter length on its outerside, said spacing rings being shaped to'interfit between said packingrings and formed with a plurality of shoulders,

said rings having elongated portions 011 one a side and shorter portionson theopposite side to-interfit with adjacent rings and a sleeve at oneend of said-packing assembly :said sleeve fitting between said plungermember and said barrel member and spring fingers on said sleeve providedwith ratchet teeth engaging one of said members to resist longitudinalmovement away from, said packing but allowing compression of saidpacking rings.

4. A pump including a, pump barrel, a plunger in saidbarrel, a packingassembly between said plunger and said barrel supported upon saidplunger,a sleeveon s'aid plunger below said packing, spring armson saidsleeve having ratchet teeth thereon, said plunger having ratchetiteethcooperating therewith to prevent said sleeve from down- Wardinovementthereon, and means on said pump barrel cooperating with "said sleeve tomove said sleeve to compress said packing rings longitudinally. v Intestimony whereof Ihereunto afiix my signature this 28th day ofAugust,-A. D. 1928.

JOSEPH H. MoEVOY.

